首先我們中心的設施標誌不清楚，這使遊客難以找到設施。

首先我們中心的設施標誌不清楚，這使遊客難以找到設施。

結果 (英文) 1:

First of all, the facility sign of our center is unclear, which makes it difficult for tourists to find the facility.

結果 (英文) 2:

First of all, the facility signs of our center are not clear, which makes it difficult for visitors to find the facilities.

結果 (英文) 3:

First of all, the signs of the facilities in our center are not clear, which makes it difficult for tourists to find the facilities.